/ ˌɪnkəˌmjuːnɪˈkɑːdəʊ; NAmE -ˈkɑːdoʊ/ adjective
without communicating with other people, because you are not allowed to or because you do not want to :
The prisoner has been held incommunicado for more than a week.
••
WORD ORIGIN
mid 19th cent.: from Spanish incomunicado , past participle of incomunicar deprive of communication.